package cn.antblog.jdk8.lambda;

public class LambdaTest {
    final static String salutation = "Hello! ";

    public static void main(String args[]){
        /*LambdaTest tester = new LambdaTest();

        // 类型声明
        MathOperation addition = (int a, int b) -> a + b;

        // 不用类型声明
        MathOperation subtraction = (a, b) -> a - b;

        // 大括号中的返回语句
        MathOperation multiplication = (int a, int b) -> { return a * b; };

        // 没有大括号及返回语句
        MathOperation division = (int a, int b) -> a / b;

        System.out.println("10 + 5 = " + tester.operate(10, 5, addition));
        System.out.println("10 - 5 = " + tester.operate(10, 5, subtraction));
        System.out.println("10 x 5 = " + tester.operate(10, 5, multiplication));
        System.out.println("10 / 5 = " + tester.operate(10, 5, division));

        // 不用括号
        GreetingService greetService1 = message ->
                System.out.println("Hello " + message);

        // 用括号
        GreetingService greetService2 = (message) ->
                System.out.println("Hello " + message);

        greetService1.sayMessage("Runoob");
        greetService2.sayMessage("Google");*/

        /*GreetingService gs = (message)-> System.out.println(salutation+message);
        gs.sayMessage("Runoob");*/

       final int num = 1;
        Converter<Integer,String> s = (param)-> {
            //num = 10;
            System.out.println(String.valueOf(param + num));
        };
        s.convert(2);
    }
        public interface Converter<T1, T2> {
            void convert(int i);
        }

        interface MathOperation {
            int operation(int a, int b);
        }

        interface GreetingService {
            void sayMessage(String message);
        }

        private int operate(int a, int b, MathOperation mathOperation){
            return mathOperation.operation(a, b);
        }

}
